To provide a piezoelectric ceramic element wherein desired mechanical strength can be ensured and the function of a slit hole can be surely displayed even if a plurality of individual electrodes are arranged in high density.
The lamination 2 of the piezoelectric ceramic element is provided with a plurality of piezoelectric ceramic layers 3, and a plurality of internal individual electrodes 4 and internal common electrodes facing each other with the piezoelectric ceramic layer 3 in-between. The internal individual electrode 4 is provided with an active area 4a overlapping the internal common electrode 5. A slit hole 8 is formed penetrating the lamination in its lamination direction in a region between the adjoining internal individual electrodes 4 in the lamination 2. The width P of the slit hole 8 is one half or less of the width W of the active area 4a in the internal individual electrode 4. The length Q of the slit hole 8 is preferably 0.7 to 1.5 times the length L of the active area 4a.
| JP5545608 | Dielectric device |
| JPH06326370 | LAMINATED LAYER TYPE PIEZOELECTRIC ACTUATOR |
| JP4868707 | Laminated piezoelectric element and injection device |
SAWARA YUZO
TATEMOTO KAZUSHI
| JPH0939239A | 1997-02-10 | |||
| JPH08252920A | 1996-10-01 | |||
| JPH07235708A | 1995-09-05 | |||
| JPH05254129A | 1993-10-05 | |||
| JP2004306136A | 2004-11-04 | |||
| JP3005028U | 1994-12-06 | |||
| JPH10128972A | 1998-05-19 | |||
| JP2003246061A | 2003-09-02 | |||
| JP2004106267A | 2004-04-08 | |||
| JPH0939239A | 1997-02-10 | |||
| JPH08252920A | 1996-10-01 | |||
| JPH07235708A | 1995-09-05 | |||
| JPH05254129A | 1993-10-05 | |||
| JP2004306136A | 2004-11-04 | |||
| JP3005028U | 1994-12-06 | |||
| JPH10128972A | 1998-05-19 | |||
| JP2003246061A | 2003-09-02 | |||
| JP2004106267A | 2004-04-08 |
Shiro Terasaki
Hiroaki Aoki
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